001 package hirondelle.web4j.request; 002 003 import java.util.TimeZone; 004 import javax.servlet.http.HttpServletRequest; 005 006 import hirondelle.web4j.util.WebUtil; 007 import hirondelle.web4j.Controller; 008 009 /** 010 Retrieve the {@link TimeZone} stored in any scope under the key 011 {@link hirondelle.web4j.Controller#TIME_ZONE}. 012 013 <P>Upon startup, the {@link hirondelle.web4j.Controller} will read in the <tt>DefaultUserTimeZone</tt> 014 configured in <tt>web.xml</tt>, and place it in application scope under the key 015 {@link hirondelle.web4j.Controller#TIME_ZONE}, as a {@link TimeZone} object. 016 017 <P><em>If desired</em>, the application programmer can also store a user-specific 018 {@link TimeZone} in session scope, <em>under the same key</em>. Thus, 019 this class will first find the user-specific <tt>TimeZone</tt>, overriding the default 020 <tt>TimeZone</tt> stored in application scope. 021 022 <P>If any other behavior is desired, then simply provide an alternate implementation of 023 {@link TimeZoneSource}. 024 */ 025 public final class TimeZoneSourceImpl implements TimeZoneSource { 026 027 /** See class comment. */ 028 public TimeZone get(HttpServletRequest aRequest){ 029 return (TimeZone)WebUtil.findAttribute(Controller.TIME_ZONE, aRequest); 030 } 031 032 }